/*
 *  Copyright 2018 The WebRTC project authors. All Rights Reserved.
 *
 *  Use of this source code is governed by a BSD-style license
 *  that can be found in the LICENSE file in the root of the source
 *  tree. An additional intellectual property rights grant can be found
 *  in the file PATENTS.  All contributing project authors may
 *  be found in the AUTHORS file in the root of the source tree.
 */

package org.webrtc;

import androidx.annotation.Nullable;

/**
 * PeerConnectionDependencies holds all PeerConnection dependencies that are
 * applied per PeerConnection. A dependency is distinct from a configuration
 * as it defines significant executable code that can be provided by a user of
 * the API.
 */
public final class PeerConnectionDependencies {
    // Mandatory dependencies.
    private final PeerConnection.Observer observer;

    // Optional fields.
    private final SSLCertificateVerifier sslCertificateVerifier;

    public static class Builder {
        private PeerConnection.Observer observer;
        private SSLCertificateVerifier sslCertificateVerifier;

        private Builder(PeerConnection.Observer observer) {
            this.observer = observer;
        }

        public Builder setSSLCertificateVerifier(SSLCertificateVerifier sslCertificateVerifier) {
            this.sslCertificateVerifier = sslCertificateVerifier;
            return this;
        }

        // Observer is a required dependency and so is forced in the construction of the object.
        public PeerConnectionDependencies createPeerConnectionDependencies() {
            return new PeerConnectionDependencies(observer, sslCertificateVerifier);
        }
    }

    public static Builder builder(PeerConnection.Observer observer) {
        return new Builder(observer);
    }

    PeerConnection.Observer getObserver() {
        return observer;
    }

    @Nullable
    SSLCertificateVerifier getSSLCertificateVerifier() {
        return sslCertificateVerifier;
    }

    private PeerConnectionDependencies(
            PeerConnection.Observer observer, SSLCertificateVerifier sslCertificateVerifier) {
        this.observer = observer;
        this.sslCertificateVerifier = sslCertificateVerifier;
    }
}
